CN116632509A - Rotary paraboloid type foldable antenna structure - Google Patents

Abstract

The invention discloses a rotating parabolic foldable antenna structure. The basic unit is designed based on the theory of rigid thick plate kirigami, and includes three single-degree-of-freedom foldable arrays, elastic drive hinges and spokes. The spring-driven hinge is installed at the connecting joint of the single-degree-of-freedom folding array, and the automatic unfolding of the folding array can be realized through spring driving. The present invention processes the surface topography of the expandable array by means of material removal and addition, so that the array has relatively high surface accuracy and realizes the stop of the unfolding motion through the interference between the board surfaces and the expandable array. The invention can be folded into a smaller volume in the non-working state for easy transportation, and in the working state, the foldable array can be unfolded to the expected working position by the driving force of the spring. The advantages of high surface accuracy.

Description

Rotating Paraboloid Foldable Antenna Structure

technical field

The invention relates to the technical field of space foldable mechanisms, in particular to a rotating parabolic foldable antenna structure.

Background technique

The space deployable structure is a structure that realizes the change of the main structure, secondary structure or a certain part of the spacecraft from the initial position or shape to the final position or shape, and maintains this state. It is a structural field gradually developed from simple to complex with the development of spacecraft. With the rapid development of the aerospace field, large-scale aerospace structures with expandable characteristics have been born. This type of expandable structure is in a folded and folded state during launch, and is fixedly installed inside the launch vehicle. After launching into orbit, it is controlled by the ground command center. The structure unfolds gradually according to the requirements, and keeps working and running after locking, thus forming a large-scale space structure. Parabolic deployable fixed surface antenna is an important application of space deployable structure in aerospace engineering, and it has attracted the attention of many researchers. It is an important part of satellite structure and an important physical platform that directly performs satellite functions.

At present, researchers at home and abroad have conducted a lot of research on the solid-surface deployable structure, and have designed various types of deployable solid-surface structures. The solid surface expandable mechanism generally forms the working surface by rigid thick plates, using hinges as the rotating joints between the rigid panels, which are folded and folded when not working, and slowly opened by driving hinges or motors when working, and supporting structures such as trusses. Existing fixed-surface deployable structures, such as sunflower-shaped foldable antennas and Cassegrain foldable antennas, have the characteristics of high surface accuracy and stable structure, but their fold-to-brow ratio is small, which makes it difficult to meet current and future use requirements. Therefore, designing a developable solid-surface structure with few degrees of freedom, simple structure, large fold-to-expand ratio, and high surface accuracy is the focus of researchers.

Contents of the invention

The purpose of the present invention is to solve the problems in the prior art, and provide a rotating parabolic foldable antenna structure with the advantages of large folding ratio, high profile precision, and high stability, aiming at solving the problem of the current space expandable antenna structure. Problems with small structural expansion ratio, low surface accuracy or inability to expand independently.

The technical scheme adopted for realizing the purpose of the present invention is:

A rotating parabolic deployable antenna structure, including multiple identical single-degree-of-freedom deployable arrays and a spoke, the spoke is located in the middle of the deployable antenna structure, and multiple single-degree-of-freedom deployable arrays are spaced around the centerline of the spoke Arranged at a certain angle; a single single-degree-of-freedom folding array is composed of multiple basic folding units arranged alternately, and each basic folding unit is composed of a rigid thick plate connected by a first spring-driven hinge; each single-degree-of-freedom folding The array and the spokes are connected by a second spring-driven hinge; when the expandable antenna structure is unfolded to the working state, the sides of the single-degree-of-freedom expandable array correspond to each other; the surface topography of the rigid plate is added and Excision processing, adjusting the dihedral angle or sector angle to formulate the curvature of the surface, so that the rigid thick plate has a predetermined profile to meet the profile and self-locking requirements.

Wherein, the structures of the multiple single-degree-of-freedom unfolding arrays are completely the same.

Wherein, the single-degree-of-freedom folding array is composed of a first basic folding unit, a second basic folding unit, and a third basic folding unit; the first basic folding unit is symmetrically arranged next to the spokes, and arranged sequentially; The second basic folding unit is arranged above the first basic folding unit; the third basic folding unit is located between the first basic folding unit and the second basic folding unit, and the first basic folding unit and the second basic folding unit The basic folding units are arranged in a staggered manner and share a rigid slab.

Wherein, when the single-degree-of-freedom folding array is unfolded into a plane and the number of columns of the rigid thick plate is determined, the number of arrays is calculated by adjusting the fan angle, so that multiple single-degree-of-freedom folding arrays are unfolded to form a closed loop, Thus formulating the curvature of the surface.

Wherein, when the dihedral angle of the single-degree-of-freedom unfolded array is determined, the curvature of the surface is formulated by adjusting the size of the dihedral angle.

Wherein, the front trapezoidal base/back trapezoidal base of the middle lower plate of the basic folding unit of the single-degree-of-freedom folding array are connected to the front side of the spokes to form a first assembly configuration and a second assembly configuration respectively.

Wherein, the front trapezoidal base of the middle lower plate of the basic folding unit is connected to the front edge of the spokes to form a first assembly configuration; when the single-degree-of-freedom folding array moves synchronously, the first assembly configuration, When unfolded to the working state, it presents the shape of a rotating paraboloid, and cuts out a complete target rotating paraboloid, and when it is folded, the trajectory is a single-degree-of-freedom movement.

Wherein, the front trapezoidal base of the middle lower plate of the basic folding unit is connected to the rear edge of the spokes to form a second assembly configuration; when the single-degree-of-freedom folding array moves synchronously, the second assembly configuration, When unfolded, it presents the shape of a parabolic plane of rotation, and after being folded, it has two different states, and the two states can be converted to each other.

Wherein, the profile of the rigid slab matches the target paraboloid by removing material, and the single degree of freedom is realized by adding material to make the rigid slab contact with the adjacent rigid slab when unfolded to the working position The folding array can be kept in the working position under the combined action of the contact force between the spring-driven hinge and the rigid thick plate, and the profile of the rigid thick plate matches the target paraboloid, forming a large folding-expanding ratio and high profile accuracy , High stability rotating paraboloid foldable structure.

Wherein, the cross-sectional shape of the single-degree-of-freedom expandable array is to rise in the form of a gradient, and when the inclination angle of the section matches the inclination angle of the parabola, removing and adding materials to the rigid thick plate makes the rigid thick plate The profile is matched with the target paraboloid.

The rotating parabolic foldable antenna structure of the present invention is based on the design of a single-degree-of-freedom deployable array based on the paper-cut folding method of a thick plate. Through the connection between the single-degree-of-freedom foldable array and the spokes, after the profile adjustment of the rigid thick plate, the spring The unfolding of the foldable structure is realized under the driving force of the driving hinge, and it is unfolded to the working position under the joint action of the driving force and the contact force, and the specific parabolic profile requirements during work are realized.

Description of drawings

Fig. 1 is a schematic diagram of a perspective view of a rotating parabolic foldable antenna structure according to an embodiment of the present invention after unfolding.

Fig. 2 is a first top view of the rotating parabolic foldable antenna structure of the embodiment of the present invention after unfolding (showing the arrangement of three single-degree-of-freedom foldable arrays).

Fig. 3 is a second schematic diagram of the rotating parabolic foldable antenna structure unfolded according to the embodiment of the present invention (showing the arrangement of five basic foldable units of each single-degree-of-freedom deployable array).

Fig. 4 is a schematic diagram of a single-degree-of-freedom unfolding array according to an embodiment of the present invention.

Fig. 5 is a schematic diagram of a spring-actuated hinge according to an embodiment of the present invention.

Fig. 6 is a schematic diagram of the angle and thickness parameters of the six thick plates of the basic folding unit according to the embodiment of the present invention.

Fig. 7 is a schematic front view of a basic folding unit with a spring-driven hinge according to an embodiment of the present invention.

Fig. 8 is a schematic rear view of a basic folding unit with spring-driven hinges according to an embodiment of the present invention.

FIG. 9 is a schematic diagram of division and cutting of a single-degree-of-freedom unfolding array according to an embodiment of the present invention.

Fig. 10 is a schematic front view of a target profile of a rotating parabolic foldable antenna structure according to an embodiment of the present invention.

Fig. 11 is a schematic view of the reverse side of the target profile of the rotating parabolic foldable antenna structure according to the embodiment of the present invention.

Fig. 12 is a schematic diagram of target profile processing of a rotating parabolic foldable antenna structure according to an embodiment of the present invention.

Fig. 13 is a schematic diagram of the assembly configuration of two different installation forms of the rotating parabolic foldable antenna structure according to the embodiment of the present invention.

Fig. 14 is a schematic diagram of the unfolding process of the rotating parabolic foldable antenna structure according to the embodiment of the present invention.

Reference signs:

1 single degree of freedom folding array, 2 spokes;

I first single degree of freedom expandable array, II second single degree of freedom expandable array, III third single degree of freedom expandable array;

1-1 first basic folding unit, 1-2 second basic folding unit, 1-3 third basic folding unit, 1-4 fourth basic folding unit, 1-5 basic folding unit;

2-1 first plate, 2-2 second plate, 2-3 third plate, 2-4 fourth plate, 2-5 fifth plate, 2-6 sixth plate, 2-7 seventh plate, 2 -8 eighth plate, 2-9 ninth plate, 2-10 tenth plate, 2-11 eleventh plate, 2-12 twelfth plate, 2-13 thirteenth plate, 2-14 fourteenth plate Plate, 2-15 fifteenth plate, 2-16 sixteenth plate, 2-17 seventeenth plate, 2-18 eighteenth plate, 2-19 nineteenth plate, 2-20 twentieth plate 2 -20;

3-1 Spring hinge left hinge, 3-2 Spring hinge right hinge, 3-3 Spring and pin, 3-4 Fixing bolt holes;

4-1 first assembly configuration, 4-2 second assembly configuration.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

The rotating parabolic foldable antenna structure of the present invention is composed of three identical single-degree-of-freedom foldable units and a spoke. The ideal working surface is obtained by adding or removing rigid thick plate materials, and the hinge is driven elastically. Drive the unfolding of the overall structure.

Referring to Figure 1, a rotating parabolic foldable antenna structure is designed based on kirigami theory and planar kirigami thickening, and is composed of a spring-driven hinge and a single-degree-of-freedom foldable array unit 1. Specifically, As shown in Figure 2, it consists of three identical first single-degree-of-freedom deployment arrays I, second single-degree-of-freedom deployment arrays II, third single-degree-of-freedom deployment arrays III and a spoke 2, each single-degree-of-freedom The single-degree-of-freedom array consists of twenty rigid slabs and twenty-eight elastically driven hinges (16 on the front and 12 on the back), with two additional springs between each single-degree-of-freedom array and the spokes Driving hinge connection, for example, the single-degree-of-freedom folding array I, the single-degree-of-freedom folding array II, and the single-degree-of-freedom folding array III are connected to the spokes through two spring-driven hinges. The surface morphology of the rigid slab is processed by material addition and removal, so that the rigid slab has a specific preset profile, and the movement of the unfolded state is stopped by using the interference between the surfaces of the rigid slab to meet the requirements Profile and self-locking requirements.

In the embodiment of the present application, for the single-degree-of-freedom folding array and the spokes, 3D printing technology can be used to make a scale model, and the processing material can be PLA. Using this processing method and material makes the processing simple and the weight is relatively low. Light and low cost.

The whole structure of the rotating parabolic foldable antenna is viewed from a top view, and the spokes are located in the middle of the deployable structure. The first single-degree-of-freedom foldable array I, the second single-degree-of-freedom foldable array II, and the third single-degree The degree of freedom folding array III is arranged at intervals of 120° around the centerline of the spokes, as shown in Figure 2, and each single degree of freedom folding array is divided and cut according to the centerline of the spokes at intervals of 120°, see Figure 9 As shown, the dotted line parts on both sides are removed to form a single-degree-of-freedom unfolded array.

In the embodiment of the present application, the spring-driven hinge is composed of a left hinge 3-1, a right hinge 3-2, a driving spring, a connecting pin 3-3 and a bolt 3-4, and the left hinge and the right hinge The pages are connected by connecting pins, the driving spring is nested on the connecting pin, and the spring wire ends of the driving spring are respectively in contact with the left hinge and the right hinge to provide driving force, and the spring driving hinge is located on the rigid At the joint of the thick plate, the left hinge and the right hinge are connected with the rigid plate to form a rotating motion pair with a driving effect, as shown in Figure 5.

In the embodiment of the present invention, the spring-driven hinge is made of metal, installed at the crease position of the single-degree-of-freedom expandable array, and has the advantages of high strength and light weight.

As an example, the structures of the three single-degree-of-freedom expandable arrays are identical, and each expandable array is composed of a plurality of basic expandable units. As an example, five basic expandable units are used to construct a For single-degree-of-freedom folding arrays, some rigid thick plates need to be cut after construction to ensure that no interference occurs after folding.

Referring to Fig. 3, wherein, the first basic folding unit 1-1 and the second basic folding unit 1-2 are arranged symmetrically, the fourth basic folding unit 1-4 and the fifth basic folding unit 1-5 Arranged symmetrically above the first basic folding unit 1-1 and the second basic folding unit 1-2, the third basic folding unit 1-3 is located at the first basic folding unit 1-1, the second basic folding unit Between the display unit 1-2, the fourth basic folding unit 1-4 and the fifth basic folding unit 1-5, as shown in Figure 3, the second basic folding unit 1-2 is in the first basic folding unit 1-1 on the right side, it has two common boards with the first basic folding unit 1-1; the fourth basic folding unit 1-4 is above the first basic folding unit 1-1, and the first basic The folding unit 1-1 has no common plate; the fifth basic folding unit 1-5 is above the second basic folding unit 1-2, and has no common board with the second basic folding unit 1-2; the third basic folding unit Unit 1-3 is located in the middle of the first basic folding unit 1-1, the second basic folding unit 1-2, the fourth basic folding unit 1-4, and the fifth basic folding unit 1-5. The basic folding unit 1-1, the second basic folding unit 1-2, the fourth basic folding unit 1-4, and the fifth basic folding unit 1-5 have six common boards.

Wherein, as shown in FIG. 4, each of the basic folding units is composed of six connected plates, such as the first basic folding unit 1-1 composed of a third plate 2-3 and a fourth plate 2-4. , the seventh plate 2-7, the eighth plate 2-8, the eleventh plate 2-11, the twelfth plate 2-12, such as the composition plate of the second basic folding unit 1-2 is the eleventh 2- 11. The twelfth board 2-12, the fifteenth board 2-15, the sixteenth board 2-16, the nineteenth board 2-19, the twentieth board 2-20; the first basic folding unit 1- 1 and the second basic folding unit 1-2 share the eleventh board 2-11 and the twelfth board 2-12, as shown in Figure 6, the structures of the other three basic folding units will not be described in detail, please refer to Figure 4.

Referring to Figure 4, taking a basic folding unit on the left as an example, two middle plates are connected up and down in the middle, and two outer plates are arranged on both sides of the middle plate, and they are connected to each other to form the basic folding unit ; The peak creases of each of the basic folding units are arranged at the junction of the left first plate (the third plate 2-3) and the middle first plate (the seventh plate 2-7) of the thick plate unit, and the left first plate (the seventh plate 2-7). The connection between the second board (the fourth board 2-4) and the middle second board (the eighth board 2-8), the middle first board (the seventh board 2-7) and the right first board (the eleventh board 2- 11) At the joint, the joint of the middle second plate (the eighth plate 2-8) and the right second plate (the twelfth plate 2-12), the valley crease is set on the left first plate (the third plate 2-3) at the junction of the left second board (fourth board 2-4), right first board (eleventh board 2-11) and at the junction of the second board (twelfth board 2-12).

As shown in Figure 6, for any basic folding unit, it can be folded normally only when the constraints of thick plate origami are met. The basic folding unit is composed of two single-vertex four-fold creases sharing one crease, and the angle relationship should satisfy : α1+α2=π, α3+α4=π, α5+α7=π, α6+α8=π, the plate thickness relationship should satisfy a1=a3=a5=A1, a2=a4=a6=A2,

Among the above parameters, a1~a6 are plate thicknesses, α1~α8 are sector angles, take the basic folding unit 1-1 as an example to explain the meaning of parameters, a1 is the thickness of the fourth plate 2-4, a2 is the eighth plate 2- 8, a3 is the thickness of the twelfth board 2-12, a4 is the thickness of the third board 2-3, a5 is the thickness of the seventh board 2-7, a6 is the thickness of the eleventh board 2-11, α1 is the angle between the top side and the right hypotenuse in the front trapezoid of the fourth board 2-4, α2 is the included angle between the top side and the left hypotenuse in the front trapezoid of the eighth board 2-8, and α3 is the seventh The angle between the bottom edge and the left hypotenuse of the front trapezoid of plate 2-7, α4 is the angle between the bottom edge and the right hypotenuse of the front trapezoid of plate 2-3, and α5 is the angle between the bottom edge and the right hypotenuse of the eighth plate 2-8 The angle between the top side and the right hypotenuse of the front trapezoid, α6 is the angle between the top side and the left hypotenuse of the front trapezoid of the twelfth board 2-12, and α7 is the front trapezoid of the eleventh board 2-11 The angle between the bottom edge and the left hypotenuse, α8 is the angle between the bottom edge and the right hypotenuse of the front trapezoid of the seventh plate 2-7.

Among them, for each basic folding unit, there are 6 rotating joints between adjacent thick plates, and each rotating joint is equipped with 1 or 2 spring-driven hinges, as shown in Figure 7 and Figure 8, and there are 6 rotating joints in the figure. Joints, there are 8 spring-driven hinges on the joints. In order to improve the rigidity, each joint on the back uses two spring-driven hinges. Viewed from the front, the installation positions of the spring-driven hinges are the left first plate, the right hypotenuse and the middle The junction of the left hypotenuse of the first board, the junction of the right hypotenuse of the second left board and the left hypotenuse of the middle second board, the junction of the left hypotenuse of the right first board and the right hypotenuse of the middle first board, the right The connection between the left hypotenuse of the second plate and the right hypotenuse of the middle second plate, viewed from the back, the installation position of the spring-driven hinge is the connection between the lower flat edge of the left first plate and the flat edge of the left second plate, and the right first plate The connection between the lower flat edge and the flat edge on the second right plate.

In the foldable antenna structure of the embodiment of the present application, when unfolded to the working state, the sides of the three single-degree-of-freedom deployable arrays correspond to each other. The three single-degree-of-freedom folding arrays are independently and synchronously deployed. For any one of the single-degree-of-freedom folding arrays, only one driving force is needed to realize the folding movement of the array. The unit 1-1 is transferred to the second basic folding unit 1-2 with a single degree of freedom, and then the second basic folding unit 1-2 with a single degree of freedom is transferred to the third basic folding unit 1-3 with a single degree of freedom , and then transferred from the third basic folding unit 1-3 with a single degree of freedom to the fourth basic folding unit 1-4 with a single degree of freedom, and then transferred to the single The fifth basic folding unit 1-5 of the degree of freedom. The spring-driven hinge provides a driving force for the single freely deployable array to unfold to a working position, and other positions provide auxiliary unfolding force to help the single freely deployable array realize folding movement.

The deployable antenna structure of the present invention is a deployable antenna structure constructed of multiple identical single-degree-of-freedom deployable arrays. In order to form a rotating paraboloid, it is necessary to form a single-degree-of-freedom deployable array through a plurality of basic deployable units. The mathematical relationship of can be described as:

Among them, m is the number of single-degree-of-freedom folding arrays, Represents the dihedral angle of adjacent rigid slabs, m _R is the number of slab layers in the optional direction around the center of the spoke in the single-degree-of-freedom expandable array.

The rotating parabolic foldable antenna structure of the embodiment of the present invention can be designed in two ways to achieve the same paraboloid, the first is to meet the design requirements by adjusting the sector angles α1 ~ α8, and the second is to adjust the dihedral angle to meet the design requirements. The target paraboloid can be obtained by adding or removing material to the rigid thick plate of the rotating paraboloid-type foldable antenna structure, as shown in Fig. 10 and Fig. 11 .

In the embodiment of the present application, the curvature of the surface can be formulated by adjusting the size of the dihedral angle. Since the shape of the single-degree-of-freedom expandable array cross-section is similar to a gradient in the form of a ladder slope, when the cross-section inclination θ is similar to the parabola inclination, the excess material on the surface can be removed by cutting, thereby forming the target parabolic surface of the expandable structure, such as As shown in Figure 12, material removal is performed on the front side of a uniformly thick plate, and the back side is left untreated. Figure 12 is a cross-sectional view of the antenna structure along the center line, in which, except for the central spoke, the thin solid lines and dotted lines on the left and right sides represent the highest or lowest position that all uniform thick plates in the structure can reach around the center dotted line for one week , there is a continuous space area between the highest and lowest positions, and the desired paraboloid can be cut out in this area. In Fig. 12, the thick solid line intervenes in the above-mentioned space region, which is a parabolic shape after material removal.

In the embodiment of the present application, there are two connection modes between the single-degree-of-freedom folding array and the central spoke. The first is the middle second plate of the basic unit 1 (that is, the eighth plate 2- 8) The front trapezoidal base of the front is connected to the front side of the spoke, the second is the back trapezoidal base of the middle second plate of the basic unit 1 (that is, the eighth plate 2-8 shown in Figures 4 and 6) and the spoke. The front edges are connected; two different assembly methods form two different configurations, which are respectively the first assembly configuration 4-1 and the second assembly configuration 4-2.

In the case of synchronous movement of single-degree-of-freedom folding and unfolding arrays, in the first assembly configuration, when unfolded to the working state, it presents a parabolic shape, and when it is folded, the trajectory is a single-degree-of-freedom movement, as shown in the left side of Figure 13; the second assembly configuration In the model, it presents a parabolic shape when unfolded, and after being folded, there are two different states after the second assembly configuration in Figure 13 is folded, and these two states can be converted to each other, as shown in the right side of Figure 13. Among them, the single-degree-of-freedom folding arrays of the first assembly configuration and the second assembly configuration are exactly the same, the difference is that the connection mode of the folding array and the central spoke is different, in the second assembly configuration, the single-degree-of-freedom folding array After being folded, it can be folded integrally around the hinges connected to the spokes, and the two states after the second assembly configuration is folded can be regarded as two states before and after folding. The aforementioned two assembly forms are different in cutting out a paraboloid. The first assembly form can cut a relatively complete target rotating paraboloid, while the second assembly form cannot completely cut out a paraboloid. The folded and unfolded states of the two assembly forms are shown in FIG. 13 .

The specific working process of the rotating parabolic foldable antenna structure in the embodiment of the present application is as follows:

Place the bottom surface of the spokes of the embodiment of the present invention on a horizontal plane, so that the single-degree-of-freedom folding array is in a folded state. After removing the intervention of the manual pressing mechanism, it will open automatically under the drive of the built-in spring-driven hinge, and unfold to the desired position. After the working position, the thick plate structure stops further expansion due to interference and collision; under the action of the spring force and the contact force of the thick plate surface, it remains at the expected working profile position. After opening, it will present a paraboloid with a specific generatrix as a whole, which is the working position of the paraboloid-shaped foldable structure. See Figure 14, which shows the first assembly configuration and the second assembly configuration An opening process in a folded state. After unfolding, the array can be folded up manually or by a special recovery device, as shown in Figure 13.

The above is only a preferred embodiment of the present invention, it should be pointed out that, for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, these improvements and Retouching should also be regarded as the protection scope of the present invention.

Claims (10)

1. The rotary paraboloid type foldable antenna structure is characterized by comprising a plurality of identical single-degree-of-freedom foldable arrays and a spoke, wherein the spoke is positioned in the middle of the foldable antenna structure, and the plurality of single-degree-of-freedom foldable arrays are distributed at certain angles around the center line of the spoke; the single-degree-of-freedom folding and unfolding array is formed by alternately arranging a plurality of basic folding and unfolding units, and each basic folding and unfolding unit is formed by connecting rigid thick plates through a first spring driving hinge; each single-degree-of-freedom folding array is connected with the spoke through a second spring driving hinge; when the foldable antenna structure is unfolded to a working state, the side edges of the single-degree-of-freedom foldable array correspond to each other; the surface morphology of the rigid thick plate is subjected to material adding and cutting treatment, and a dihedral angle or a sector angle is adjusted to make a curved surface curvature, so that the rigid thick plate has a preset molded surface to meet the molded surface and self-locking requirements.

2. The rotating parabolic dish type foldable antenna structure according to claim 1, wherein the structures of the plurality of single degree of freedom foldable arrays are identical.

3. The rotating parabolic foldable antenna structure according to claim 1, wherein the single degree of freedom foldable array is composed of a first basic foldable unit, a second basic foldable unit, and a third basic foldable unit; the first basic folding and unfolding units are symmetrically arranged next to the spokes and are sequentially arranged; the second basic folding and unfolding units are arranged above the first basic folding and unfolding units; the third basic folding and unfolding unit is positioned between the first basic folding and unfolding unit and the second basic folding and unfolding unit, and the first basic folding and unfolding unit and the second basic folding and unfolding unit are arranged in a staggered manner and share the rigid thick plate.

4. The structure of claim 1, wherein when the single degree of freedom folded array is unfolded into a plane and the number of columns of the rigid thick plates is determined, the number of arrays is calculated by adjusting the size of the fan-shaped angle, so that a plurality of the single degree of freedom folded arrays are unfolded to form a closed loop, thereby making a curvature of a curved surface.

5. The rotating parabolic type foldable antenna structure according to claim 1, wherein when the dihedral angle of the single degree of freedom foldable array is determined, the curvature of the curved surface is formulated by adjusting the magnitude of the dihedral angle.

6. The rotating parabolic dish type foldable antenna structure according to claim 1, wherein a front trapezoid base/a rear trapezoid base of a middle lower plate of the basic folding unit of the single degree of freedom folding array is connected with a front side line of a spoke to form a first assembling configuration and a second assembling configuration respectively.

7. The rotating parabolic dish-type foldable antenna structure according to claim 6, wherein the front trapezoid base of the intermediate lower plate of the basic folding unit is connected to the front side line of the spoke to form a first assembly configuration; the first assembly configuration is in a shape of a paraboloid of revolution when being unfolded to a working state when the single-degree-of-freedom folded array synchronously moves, and a complete target paraboloid of revolution is cut out, and a track moves in a single degree of freedom when being folded.

8. The rotating parabolic dish-type foldable antenna structure according to claim 6, wherein the front trapezoid base of the intermediate lower plate of the basic folding unit is connected to the back side line of the spoke to form a second assembly configuration; the second assembly configuration presents a parabolic shape when unfolded when the single-degree-of-freedom folding array moves synchronously, and has two different states after the folding is completed, and the two states can be mutually converted.

9. The structure of claim 1, wherein the profile of the rigid plank is matched with the target paraboloid by removing material, and the rigid plank is contacted with the adjacent rigid plank when being unfolded to the working position by adding material, so that the single-degree-of-freedom folding array can be kept in the working position under the combined action of the contact force between the spring driving hinge and the rigid plank, and the profile of the rigid plank is matched with the target paraboloid, so that the rotating paraboloid type folding structure with large folding ratio, high profile precision and high stability is formed.

10. The structure of claim 1, wherein the single degree of freedom deployable array has a cross-sectional shape that rises in a gradient fashion in a stepped slope, and when the cross-sectional tilt matches the parabolic tilt, the profile of the rigid slab is matched to the target parabola by removing and adding material to the rigid slab.